Speaker
Shengyu HE
(EPFL)
Description
DESI DR2 delivers over 30 million redshifts from the first three years of the main survey, enabling high-precision large-scale structure measurements. In this talk, I will present an assessment of spectroscopic systematics in DR2, with a focus on redshift uncertainties and catastrophic redshift errors. Using repeated observations of BGS, LRG, ELG, and QSO targets, we empirically characterize redshift-error distributions and build models for their impact on clustering and cosmological inference.
Author
Shengyu HE
(EPFL)